/*
 * Copyright (C) 2005 - 2013 MaNGOS <http://www.getmangos.com/>
 *
 * Copyright (C) 2008 - 2013 Trinity <http://www.trinitycore.org/>
 *
 * Copyright (C) 2010 - 2013 ArkCORE <http://www.arkania.net/>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

/** \file
 \ingroup Trinityd
 */

#include <ace/Sig_Handler.h>

#include "Common.h"
#include "SystemConfig.h"
#include "SignalHandler.h"
#include "World.h"
#include "WorldRunnable.h"
#include "WorldSocket.h"
#include "WorldSocketMgr.h"
#include "Configuration/Config.h"
#include "Database/DatabaseEnv.h"
#include "Database/DatabaseWorkerPool.h"

#include "CliRunnable.h"
#include "Log.h"
#include "Master.h"
#include "RARunnable.h"
#include "TCSoap.h"
#include "Timer.h"
#include "Util.h"
#include "AuthSocket.h"

#include "BigNumber.h"
#include "ArkChat/IRCClient.h"

#ifdef _WIN32
#include "ServiceWin32.h"
extern int m_ServiceStatus;
#endif

/// Handle worldserver's termination signals
class WorldServerSignalHandler: public Trinity::SignalHandler {
public:
    virtual void HandleSignal(int SigNum) {
        switch (SigNum) {
        case SIGINT:
            World::StopNow(RESTART_EXIT_CODE);
            break;
        case SIGTERM:
#ifdef _WIN32
            case SIGBREAK:
            if (m_ServiceStatus != 1)
#endif /* _WIN32 */
            World::StopNow(SHUTDOWN_EXIT_CODE);
            break;
        }
    }
};

class FreezeDetectorRunnable: public ACE_Based::Runnable {
public:
    FreezeDetectorRunnable() {
        _delaytime = 0;
    }
    uint32 m_loops, m_lastchange;
    uint32 w_loops, w_lastchange;
    uint32 _delaytime;
    void SetDelayTime(uint32 t) {
        _delaytime = t;
    }
    void run(void) {
        if (!_delaytime)
            return;
        sLog->outString(
                "Starting up anti-freeze thread (%u seconds max stuck time)...",
                _delaytime / 1000);
        m_loops = 0;
        w_loops = 0;
        m_lastchange = 0;
        w_lastchange = 0;
        while (!World::IsStopped()) {
            ACE_Based::Thread::Sleep(1000);
            uint32 curtime = getMSTime();
            // normal work
            if (w_loops != World::m_worldLoopCounter) {
                w_lastchange = curtime;
                w_loops = World::m_worldLoopCounter;
            }
            // possible freeze
            else if (getMSTimeDiff(w_lastchange, curtime) > _delaytime) {
                sLog->outError("World Thread hangs, kicking out server!");
                ASSERT(false);
            }
        }
        sLog->outString("Anti-freeze thread exiting without problems.");
    }
};

Master::Master() {
}

Master::~Master() {
}

/// Main function
int Master::Run() {
    BigNumber seed1;
    seed1.SetRand(16 * 8);

    sLog->outString("%s (worldserver-daemon)", _CLIENT_BUILD_REVISION);
            sLog->outString(" ");
            sLog->outString(" A World of Warcraft: Mist of Pandaria Core Emulator	");
            sLog->outString("       _/_/              _/          _/_/_/    _/_/    _/_/_/    _/_/_/_/  ");
            sLog->outString("    _/    _/  _/  _/_/  _/  _/    _/        _/    _/  _/    _/  _/         ");
            sLog->outString("   _/_/_/_/  _/_/      _/_/      _/        _/    _/  _/_/_/    _/_/_/      ");
            sLog->outString("  _/    _/  _/        _/  _/    _/        _/    _/  _/    _/  _/           ");
            sLog->outString(" _/    _/  _/        _/    _/    _/_/_/    _/_/    _/    _/  _/_/_/_/  	");
            sLog->outString(" Arkania Community (c) 2013");
            sLog->outString("      <http://arkania.net/>");
            sLog->outString(" ");
            sLog->outString("<Ctrl-C> to stop.\n");

#ifdef USE_SFMT_FOR_RNG
            sLog->outString("\n");
            sLog->outString("SFMT has been enabled as the random number generator, if worldserver");
            sLog->outString("freezes or crashes randomly, first, try disabling SFMT in CMAKE configuration");
            sLog->outString("\n");
#endif //USE_SFMT_FOR_RNG
            /// worldserver PID file creation
            std::string pidfile = sConfig->GetStringDefault("PidFile", "");
            if (!pidfile.empty())
            {
                uint32 pid = CreatePIDFile(pidfile);
                if (!pid)
                {
                    sLog->outError("Cannot create PID file %s.\n", pidfile.c_str());
                    return 1;
                }

                sLog->outString("Daemon PID: %u\n", pid);
            }

            ///- Start the databases
            if (!_StartDB())
            return 1;

            // set server offline (not connectable)
            LoginDatabase.DirectPExecute("UPDATE realmlist SET color = (color & ~%u) | %u WHERE id = '%d'", REALM_FLAG_OFFLINE, REALM_FLAG_INVALID, realmID);

            ///- Initialize the World
            sWorld->SetInitialWorldSettings();

            ///- Initialize the signal handlers
            WorldServerSignalHandler SignalINT, SignalTERM;
#ifdef _WIN32
            WorldServerSignalHandler SignalBREAK;
#endif /* _WIN32 */

            ///- Register worldserver's signal handlers
ACE_Sig_Handler Handler;
Handler.register_handler(SIGINT, &SignalINT);
Handler.register_handler(SIGTERM, &SignalTERM);
#ifdef _WIN32
    Handler.register_handler(SIGBREAK, &SignalBREAK);
#endif /* _WIN32 */

    ///- Launch WorldRunnable thread
    ACE_Based::Thread world_thread(new WorldRunnable);
    world_thread.setPriority(ACE_Based::Highest);

    ACE_Based::Thread* cliThread = NULL;

#ifdef _WIN32
    if (sConfig->GetBoolDefault("Console.Enable", true) && (m_ServiceStatus == -1)/* need disable console in service mode*/)
#else
    if (sConfig->GetBoolDefault("Console.Enable", true))
#endif
            {
        ///- Launch CliRunnable thread
        cliThread = new ACE_Based::Thread(new CliRunnable);
    }

    ACE_Based::Thread rar_thread(new RARunnable);

    ///- Handle affinity for multiple processors and process priority on Windows
#ifdef _WIN32
    {
        HANDLE hProcess = GetCurrentProcess();

        uint32 Aff = sConfig->GetIntDefault("UseProcessors", 0);
        if (Aff > 0)
        {
            ULONG_PTR appAff;
            ULONG_PTR sysAff;

            if (GetProcessAffinityMask(hProcess, &appAff, &sysAff))
            {
                ULONG_PTR curAff = Aff & appAff; // remove non accessible processors

                if (!curAff)
                {
                    sLog->outError("Processors marked in UseProcessors bitmask (hex) %x are not accessible for the worldserver. Accessible processors bitmask (hex): %x", Aff, appAff);
                }
                else
                {
                    if (SetProcessAffinityMask(hProcess, curAff))
                    sLog->outString("Using processors (bitmask, hex): %x", curAff);
                    else
                    sLog->outError("Can't set used processors (hex): %x", curAff);
                }
            }
            sLog->outString("");
        }

        bool Prio = sConfig->GetBoolDefault("ProcessPriority", false);

        //if (Prio && (m_ServiceStatus == -1)  /* need set to default process priority class in service mode*/)
        if (Prio)
        {
            if (SetPriorityClass(hProcess, HIGH_PRIORITY_CLASS))
            sLog->outString("worldserver process priority class set to HIGH");
            else
            sLog->outError("Can't set worldserver process priority class.");
            sLog->outString("");
        }
    }
#endif
    //Start soap serving thread
    ACE_Based::Thread* soap_thread = NULL;

    if (sConfig->GetBoolDefault("SOAP.Enabled", false)) {
        TCSoapRunnable *runnable = new TCSoapRunnable();
        runnable->setListenArguments(
                sConfig->GetStringDefault("SOAP.IP", "127.0.0.1"), sConfig->GetIntDefault("SOAP.Port", 7878));
        soap_thread = new ACE_Based::Thread(runnable);
    }

	// Start up ArkChat
    if (sIRC.Active == 1)
    {
        ACE_Based::Thread irc(new IRCClient);
        irc.setPriority ((ACE_Based::Priority )2);
    }
    else
        sLog->outString("*** IRC Client (ArkChat) is Disabled, see the worldserver.conf. *");

    ///- Start up freeze catcher thread
    if (uint32 freeze_delay = sConfig->GetIntDefault("MaxCoreStuckTime", 0)) {
        FreezeDetectorRunnable *fdr = new FreezeDetectorRunnable();
        fdr->SetDelayTime(freeze_delay * 1000);
        ACE_Based::Thread freeze_thread(fdr);
        freeze_thread.setPriority(ACE_Based::Highest);
    }

    ///- Launch the world listener socket
    uint16 wsport = sWorld->getIntConfig(CONFIG_PORT_WORLD);
    std::string bind_ip = sConfig->GetStringDefault("BindIP", "0.0.0.0");

    if (sWorldSocketMgr->StartNetwork(wsport, bind_ip.c_str()) == -1) {
        sLog->outError("Failed to start network");
        World::StopNow(ERROR_EXIT_CODE);
        // go down and shutdown the server
    }

    // set server online (allow connecting now)
    LoginDatabase.DirectPExecute(
            "UPDATE realmlist SET color = color & ~%u, population = 0 WHERE id = '%u'",
            REALM_FLAG_INVALID, realmID);

    sLog->outString("%s (worldserver-daemon) ready...", _FULLVERSION);
    sWorldSocketMgr->Wait();

    if (soap_thread) {
        soap_thread->wait();
        soap_thread->destroy();
        delete soap_thread;
    }

    // set server offline
    LoginDatabase.DirectPExecute(
            "UPDATE realmlist SET color = color | %u WHERE id = '%d'",
            REALM_FLAG_OFFLINE, realmID);

    // when the main thread closes the singletons get unloaded
    // since worldrunnable uses them, it will crash if unloaded after master
    world_thread.wait();
    rar_thread.wait();

    ///- Clean database before leaving
    clearOnlineAccounts();

    _StopDB();

    sLog->outString("Halting process...");

    if (cliThread) {
#ifdef _WIN32

        // this only way to terminate CLI thread exist at Win32 (alt. way exist only in Windows Vista API)
        //_exit(1);
        // send keyboard input to safely unblock the CLI thread
        INPUT_RECORD b[5];
        HANDLE hStdIn = GetStdHandle(STD_INPUT_HANDLE);
        b[0].EventType = KEY_EVENT;
        b[0].Event.KeyEvent.bKeyDown = TRUE;
        b[0].Event.KeyEvent.uChar.AsciiChar = 'X';
        b[0].Event.KeyEvent.wVirtualKeyCode = 'X';
        b[0].Event.KeyEvent.wRepeatCount = 1;

        b[1].EventType = KEY_EVENT;
        b[1].Event.KeyEvent.bKeyDown = FALSE;
        b[1].Event.KeyEvent.uChar.AsciiChar = 'X';
        b[1].Event.KeyEvent.wVirtualKeyCode = 'X';
        b[1].Event.KeyEvent.wRepeatCount = 1;

        b[2].EventType = KEY_EVENT;
        b[2].Event.KeyEvent.bKeyDown = TRUE;
        b[2].Event.KeyEvent.dwControlKeyState = 0;
        b[2].Event.KeyEvent.uChar.AsciiChar = '\r';
        b[2].Event.KeyEvent.wVirtualKeyCode = VK_RETURN;
        b[2].Event.KeyEvent.wRepeatCount = 1;
        b[2].Event.KeyEvent.wVirtualScanCode = 0x1c;

        b[3].EventType = KEY_EVENT;
        b[3].Event.KeyEvent.bKeyDown = FALSE;
        b[3].Event.KeyEvent.dwControlKeyState = 0;
        b[3].Event.KeyEvent.uChar.AsciiChar = '\r';
        b[3].Event.KeyEvent.wVirtualKeyCode = VK_RETURN;
        b[3].Event.KeyEvent.wVirtualScanCode = 0x1c;
        b[3].Event.KeyEvent.wRepeatCount = 1;
        DWORD numb;
        WriteConsoleInput(hStdIn, b, 4, &numb);

        cliThread->wait();

#else

        cliThread->destroy();

#endif

        delete cliThread;
    }

    // for some unknown reason, unloading scripts here and not in worldrunnable
    // fixes a memory leak related to detaching threads from the module
    //UnloadScriptingModule();

    // Exit the process with specified return value
    return World::GetExitCode();
}

/// Initialize connection to the databases
bool Master::_StartDB() {
    MySQL::Library_Init();

    sLog->SetLogDB(false);
    std::string dbstring;
    uint8 async_threads, synch_threads
;
    dbstring = sConfig->GetStringDefault("WorldDatabaseInfo", "");
    if (dbstring.empty()) {
        sLog->outError("World database not specified in configuration file");
        return false;
    }

    async_threads = sConfig->GetIntDefault("WorldDatabase.WorkerThreads", 1);
    if (async_threads < 1 || async_threads > 32) {
        sLog->outError(
                "World database: invalid number of worker threads specified. "
                        "Please pick a value between 1 and 32.");
        return false;
    }

    synch_threads = sConfig->GetIntDefault("WorldDatabase.SynchThreads", 1);
    ///- Initialise the world database
    if (!WorldDatabase.Open(dbstring, async_threads, synch_threads)) {
        sLog->outError("Cannot connect to world database %s", dbstring.c_str());
        return false;
    }

    ///- Get character database info from configuration file
    dbstring = sConfig->GetStringDefault("CharacterDatabaseInfo", "");
    if (dbstring.empty()) {
        sLog->outError(
                "Character database not specified in configuration file");
        return false;
    }

    async_threads = sConfig->GetIntDefault("CharacterDatabase.WorkerThreads",
            1);
    if (async_threads < 1 || async_threads > 32) {
        sLog->outError(
                "Character database: invalid number of worker threads specified. "
                        "Please pick a value between 1 and 32.");
        return false;
    }

    synch_threads = sConfig->GetIntDefault("CharacterDatabase.SynchThreads", 2);

    ///- Initialise the Character database
    if (!CharacterDatabase.Open(dbstring, async_threads, synch_threads)) {
        sLog->outError("Cannot connect to Character database %s",
                dbstring.c_str());
        return false;
    }

    ///- Get login database info from configuration file
    dbstring = sConfig->GetStringDefault("LoginDatabaseInfo", "");
    if (dbstring.empty()) {
        sLog->outError("Login database not specified in configuration file");
        return false;
    }

    async_threads = sConfig->GetIntDefault("LoginDatabase.WorkerThreads", 1);
    if (async_threads < 1 || async_threads > 32) {
        sLog->outError(
                "Login database: invalid number of worker threads specified. "
                        "Please pick a value between 1 and 32.");
        return false;
    }

    synch_threads = sConfig->GetIntDefault("LoginDatabase.SynchThreads", 1);
    ///- Initialise the login database
    if (!LoginDatabase.Open(dbstring, async_threads, synch_threads)) {
        sLog->outError("Cannot connect to login database %s", dbstring.c_str());
        return false;
    }

    ///- Get the realm Id from the configuration file
    realmID = sConfig->GetIntDefault("RealmID", 0);
    if (!realmID) {
        sLog->outError("Realm ID not defined in configuration file");
        return false;
    }
    sLog->outString("Realm running as realm ID %d", realmID);

    ///- Initialize the DB logging system
    sLog->SetLogDBLater(sConfig->GetBoolDefault("EnableLogDB", false)); // set var to enable DB logging once startup finished.
    sLog->SetLogDB(false);
    sLog->SetRealmID(realmID);

    ///- Clean the database before starting
    clearOnlineAccounts();

    ///- Insert version info into DB
    WorldDatabase.PExecute("UPDATE version SET core_version = '%s', core_revision = '%s'", _FULLVERSION, _HASH);

    sWorld->LoadDBVersion();

    sLog->outString("Using World DB: %s", sWorld->GetDBVersion());
    sLog->outString("Using creature AI: %s", sWorld->GetCreatureAIVersion());
    return true;
}

void Master::_StopDB() {
    CharacterDatabase.Close();
    WorldDatabase.Close();
    LoginDatabase.Close();

    MySQL::Library_End();
}

/// Clear 'online' status for all accounts with characters in this realm
void Master::clearOnlineAccounts() {
    // Cleanup online status for characters hosted at current realm
    /// \todo Only accounts with characters logged on *this* realm should have online status reset. Move the online column from 'account' to 'realmcharacters'?
    LoginDatabase.DirectPExecute(
            "UPDATE account SET online = 0 WHERE online > 0 "
                    "AND id IN (SELECT acctid FROM realmcharacters WHERE realmid = '%d')",
            realmID);

    CharacterDatabase.DirectExecute(
            "UPDATE characters SET online = 0 WHERE online <> 0");

    // Battleground instance ids reset at server restart
    CharacterDatabase.DirectExecute(
            CharacterDatabase.GetPreparedStatement(CHAR_RESET_PLAYERS_BGDATA));
}
